Mine-lamp.



UNITED STATES PATENT OFFICE.

WILLIAM MCKEAN WHITE AND EVERTON C. BBOMMER, OF INDIANAPOLIS, INDIANA, ASSIGNORS, BY MESNE ASSIGNMENTS, TO ELECTRIC SERVICE SUPPLIES (*LOMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MINE-LAMP.

7 specification of Letters Patent.

Application filed July 6, 1915. Serial No. 38,054.

' 'In'rn and Ev'na'ron (I. BROSIHER, citizens of the United States, residing at Indian- 'apolis. in'the county of Marion and State of Indiana, have invented a new and useful Mine-Lamp, of which the following is a specification. i 7

It is the object of our invention to provide alreadlight construction. particularly applicable for mine locomotives which usually have rather rough traveling, wherein the jarring of the source oi illnmlnatlon and of the reflector is in 'large part avoided.

In carrying out oufinvention, we provide a reflector, preferably a glass reflector, and a source of illuinimition, 'n'eterably an -1ncandescent lamp, and mount them in n siiitable frame or caiii gil',which in turn we mount in an otiitellliif lfnie or casing by a spring mounting. peter-ably, this spring mounting include. a number of radial springs. preferably under tension, and one or more leaf springs which bea against the back of the inner casing.

The accon'ipanying drawing our invention.

,Figure 1 is a front view of a headlight embodying our invention; Fig. 2 is a side view thereof; Fig. 3 is a section on the "line 33 of Fig. 2; Fig. 4. is a section on the line 4-l of Fig. 1; and Fig; 5 is a detail of the mounting of one end of one of the radial tension springs.

he outer casinglO is conveniently of a general cylindrical form and is provided with supporting legs 11 and a handle 1 At the front ofthis outer casing there is preferably a door 13, mounted on a hinge illustrates 14 and provided with a suitable latch 15.

In this swinging door is the usual glass plate 16, through which the light rays are projected forward. \Vithin the enter casing 10 is an inner casin 20. This is preferably oi the form shown in Fig. 4, with a larger cylindrical front portion and a smaller cylindrical rear portion, the rear portion being closed by a rear wall 21. Within this inner casing 20 is the reflector 22, which is a glass reflector in thepreferred form or our invention. An incandescent electric light is mounted on the focus of this reflector 22, which is preferably a parabolic reflector, this lamp bulb being carried by a socket 2+ inthe axis of the reflector 22 but located behind such reflector. Around the larger iorward portion of the inner casing 20 are a number of holes 95, through each of which extends a radial spring 26. The springs 26 are n'ct'erably tension springs. Each sprin 26 is attached at each *end to a scrcw'iQT. conveniently being ensmallcd at the end to inclose the stem of such screw and to receive between such ensmalled end and the head of the screw a washer 28, as is clear from Fig. 'lhe screws on. the outer ends of the springs 26 projectthrough the outer casinglO and receive nuts '23), which bear against the outside o1 such outer casing. The screws 27 at the inner ends of the springs 26 project through brackets 30 carried by and inside of the inner casing 20. and also receive nuts 29. i'fhc nuts 29 are tightened to put the springszo under the desired tension. A pair of leaf springs 32 are tastened to the rear, wall 33 ot' the outer casing 10, near the edge of such wall, and their inner and free ends bear against the rear wall 21 of the inner casing 20. The springs 32 are in a vertical plane, as is clear from Figs. 3 and 4. Thesc leaf springs 32 assist the tension springs 26 in maintaining the inner casing 20 properly centered, and in preventing the jars of the locomotive ironrbcing transmitted to such inner casing and tothe reflector 22 and lamp bulb 23. lVe claim as our invention:

. Patented May 16, 1916.

- I" 1. A headlight, comprising an outer casing,ai1 inner casing, a reflector and a source of illumination carried by such inner casing, and a plurality of substantially radial tension springs supporting said inner cas ing from the outer casing, said tension springs passing through the inner casing and being attached to supports on the inside of theinner casing and to the, outer orts on the insideot' the inner casim and to the outer casing.

33. A lnadlight, comprising an outer cas-.

ing, an inner casing, asreflcctor and a source ing, and a plurality of substantially radial springs supporting said inner casing from the outer casing.

5 A headlight, comprising an outer casing, an inner casing, a reflector and a source ofillumination earricd by such inner casing, a plurality of substantially radial tension springs supporting said inner asing from the outer casing. and a leaf spring'acting between the outer casing and the rear wall of the inner casing.

(3. A headlight. comprising an outer casing. an inner easing, a reflector and a source of illumination carried by such inner casing, a plurality of substantially radial springs supporting said inner casing from the outer casing, and a leaf spring acting between the outer casing and the rear wall of the inner casing.

7. A headlight, comprising an outer casing. an inner casing, a reflector and a source of illumination carried by such inner casing, a plurality of substantially radial tension springs supporting said inner casing from the outer casing, and a leaf spring acting between the outer casing and the rear wall of the inner using, said leaf spring being in a vertical plane.

is. A headlight, comprising an outer casing, an inner casing, a reflector and a source of illumination carried by such inner casing. a plurality of substantially radial springs supporting said inner casing from the outer casing, and a leaf spring acting between the outer casing and the rear wall of the inner casing, said leaf spring being in supports on the inside of the casing.

In witness whereof, we have hereunto set our hands at Imlianapolis, Indiana, this th day of June, A. I). one thousand nine hundred and fifteen.

\Y. MeKEAN lVHITE. EVERTON C. BROMMERQ 

